High grade hot rolled narrow strip steel

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300 m.t.
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5000 m.t./month

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Definition

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Strip steel

The strip generally supplied in rolls, has the advantages of high size precision,good surface quality, easy processing, material saving etc.. With the same steel plate, strip by strip material is divided into ordinary and high quality strip steel two categories; according to the manufacturing method of hot rolled strip,cold rolled strip two.

2 scope of application

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Steel is widely used in the production of welded steel pipe as blank, cold-formed steel, manufacturing bicycle frame, wheels, clamps, washer, spring film,saw blade, metal products and blade etc..

Cold-formed steel

In broadband steel

The 3 process

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The production process of cold rolled strip steel is generally: picklinglubrication, rolling, process, anneal and flat, cutting, packaging.

Cold rolled strip steel pickling rolling process: -- -- -- -- the size of synchronousrolling annealing lubricating antirust oil length -- -- -- flat polished package

Hot strip rolling heating furnace dephosphorization machine: -- -- -- --phosphorus removal roughing mill machine finishing mill surface quality inspection instrument -- -- -- -- layer cold coiler bundling machine -- number spraying machine -- volume base slab

The production process of hot rolling strip steel: first in the heating furnace of increasing the temperature to the desired temperature of rolling, and then oxidized to tin machine generated on the slab roller into the roughingphosphorus removal treatment, then enter the width and thickness of striproughing rolling unit rolling, iron oxide by roller conveying to phosphorus on the strip surface finishing machine produce processing, enter the width and thickness of strip finishing rolling unit for more precision rolling, strip by rollerby layer on the surface temperature of cold roll strictly control take before and after, enters the coiler for steel coil finally bundling, spraying number into thevolume storage packaging.

4 Market

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In May 20th Shengfang steel prices down. According to the data Chineseindustry insight network show: Hebei forward, Sheng Bao, Bazhou Xinya, the new crown made 2.5* (232-355) steel price is 3400 yuan (ton price, the same below), down 50 yuan more than last Friday.

Influenced by Tangshan last week, small narrow billet prices, Saturday (18 days) in Shengfang area with steel mills have lowered the ex factory price. The price decline, turnover performance in general, opened today manufacturersoffer temporary stability. In addition, the Tangshan area steel prices also have lowered, 355mm strip retail pricing million in 3320-3350, with the local price difference between 50-80 yuan, relatively reasonable.

Today Tangshan small narrow band market prices show small to rise, and the futures, electronic disk also rise, but the rise of strength are insufficient. At present, the overall trend of steel spot market downturn, but the steel market is restricted by the supply pressure, the market price is the emergence of the continuing rise in prices. And will soon enter the consumer off-season, terminaldemand release rate has slowed down, expected short-term local steel marketprice is still dominated by the shock consolidation.

5 Classification

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Hot rolled strip

1, hot rolled ordinary carbon structural steel (GB3524-83)

Strip steel

Hot rolled plain carbon steel with ordinary carbon structural steel as material,made of 1.80-6.00mm hot rolled strip thickness, width of 50-1200mm.

(1) the main purposes

Mainly used for cold rolling billet, cold-formed steel billet, welded steel pipebillet and bicycle, hardware products manufacturing.

(2) grade and chemical composition of materials

Standards and grades

National standard

Quite foreign standard

Function and use

Material categories

The implementation of standards

Grade

Standard No.

Grade

Suitable for manufacturing of cold forming parts

Low carbon steel coil

Q/BQB302

SPHC

JISG3131

SPHC

SPHD

SPHD

SPHE

SPHE

SAE1006/SAE1008

SAE1006/SAE1008

XG180IF/200IF

XG180IF/200IF

Steel for general structure

GB/T912-1989

Q195

JISG3101

SS330

For general construction of buildings, bridges, ships, vehicles, etc.

Q235B

SS400

SS400

SS490

ASTMA36

SS540

(3) the mechanical properties

The nominal thickness

The yield strength (Mpa)

Tensile strength (Mpa)

Elongation of A50mm%

The 180 degree bend test

>1.5-2.5

Less than or equal to 290

More than 310

More than 38

D=0a

>2.5-3.0

Less than or equal to 290

More than 300

More than 38

D=0a

>3.0-4.0

Less than or equal to 290

More than 300

More than 40

D=1/2a

Use of hot-rolled steel 2, bicycle (GB3645-89)

Bicycle for hot rolled wide strip steel in carbon steel and low alloy steel asmaterial, made of 1.8-8.0mm strip steel thickness after hot rolling, the strip width can reach 1300mm.

(1) the main uses special for bicycle manufacturing materials.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) strip (board) size

The thickness of the steel plate strip thickness 1.8-6.0mm, 7, 8.0mm.

Strip (board) width: rimming steel is less than or equal to 1300mm (a=2.0-6.0)

Killed steel is less than or equal to 1250mm (a = 3)

Less than or equal to 1300mm (a = 3)

The length of the plate, steel coil diameter 760mm, 4-6m plate.

Hot rolled strip with 3, bicycle (GB3647-89)

(1) the main purposes

Bicycle designed for the manufacture of hot rolled strip of bicycle and the chain, also can be used for cold rolled and welded pipe blank blank.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) the specification of strip

Bicycles are generally used for hot rolled strip steel strip thickness of 1.8-8.0mm, width of 60-250mm.

Hot rolled strip with 4, pressure vessel (GB5681-85)

(1) the main purposes

Used in the manufacture of low pressure vessel.

(2) grade and chemical composition of materials

(3) the mechanical properties

(4) the specification of strip and production unit

Pressure vessel is generally used for hot rolled strip steel strip thickness of 4mm, width of 80mm double length, length of not less than 70m (volume).

Cold rolling of strip

(1) the main purposes

Cold-rolled carbon steel for the manufacture of bicycles, sewing machines,agricultural machinery and other accessories and hardware products.

(2) grade and chemical composition of materials

Grade

Supply standard

Supply size

Use

SPCC

Q195

Q235-B

GB/T912

GB/T3274

Width

Mm

Thickness

Mm

Widely used in engineering machinery, transportation machinery, construction machinery, hoisting machinery


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Q:What are the characteristics of cold rolled strip technology?
Cold rolled blank because the surface covered with oxide film and a small amount of impurities, will directly affect the precision of rolling and the quality of the product, so the blank material must first sent to the shallow groove company push-pull continuous pickling, pickling of oxide film and annealing to remove impurities, can be sent to the high precision six roller reversible rolling mill made the required thickness. After rolling through forced circulation cover type bright annealing furnace and high precision leveling unit two Kun to soften and smooth surface, and then finished packing or according to customer demand straight points, finally packaging factory.
Q:What is the hardness of cold rolled steel strip?
Generally, the Rockwell hardness of annealed carbon steel is 55+-3, and the hardness of annealed cold rolled strip is above 80
Q:How to drill through galvanized steel strip quality piercing eye
To distinguish the quality of galvanized strip is mainly from the aspects of surface finish / coating thickness / coating thickness difference / coating adhesion / salt fog test time and so on. GB 4175.2-1984 armored cables, galvanized steel strip, /GB-T 15392-1994, width less than 700mm, continuous hot-dip galvanized steel strip, etc., as you requested.
Q:What are the raw materials for making strip steel?
Cable for cold rolled strip using B2F and BY2F steel as the material used for the steel base material of galvanized or other coating strip manufacturing armoured cable
Q:What are the advantages of cold rolling and cold rolling strip steel?
What to do with cold rolling is better than that of hot rolling, which is the main one because cold rolling is processed by hot rollingCold: hot rolled steel coil as raw material by pickling descaling after cold rolling, the finished rolling hard volumes, due to continuous deformation caused by cold hardening the volume rolling hard strength, hardness, toughness index rise decline, so the stamping performance will deteriorate, only for a simple deformation of parts.Cold rolled steel strip and sheet thickness is generally 0.1 ~ 3mm, width 100 ~ 2000mm in hot strip steel or timber as raw material, under normal temperature after cold rolling, cold rolled steel strip and sheet has the advantages of smooth surface, smooth, high precision and good mechanical properties.
Q:Reasons for black side of hot strip galvanizing
Solution: contains too much impurity in the bath can use saline and Potassium Permanganate rushed ang impurity, or adding zinc chloride solution to current economic treatment; the strict monitoring of the production process to prevent the emergence of this phenomenon; low content of zinc chloride can be solved by adding zinc chloride.
Q:What's the difference between hot rolled strip and cold rolled strip? What's the difference between hot rolled coil and cold rolled coil?
Hot rolled coil is above the recrystallization temperature of rolling, cold-rolled plate refers to the recrystallization temperature following rolling, popular point that is in the hot strip rolling red hot state, while cold rolled hot-rolled is under normal temperature rolling. Hot plate often said refers to the hot rolled plate, cold plate refers to the cold rolled plate, hot rolled, cold rolled and hot rolled coil is said and cold rolled coil.
Q:Is the strip steel strip?
Some thicker medium plate production is not produced by strip steel. In any case, the strip is a general term for strip and plate.
Q:What's the reason for the strip after pickling?
Pickling is only surface rust removal, which will not affect the hardness of the material.
Q:What about the strip scraping in the annealing furnace?
Thus forming an air knife scratch. This kind of defect causes the product to be wasted because the coating is scratched. Proper control of strip tension in productionForce and adjust the nozzle distance, can avoid this kind of defect happen.

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